import cv2
video=cv2.VideoCapture('yzbf.mp4')
while(video.isOpened()):
    ertval,image=video.read()
    cv2.namedWindow(("Video",0))
    cv2.resizeWindow('Video',420,300)
    if retval==True:
        cv2.imshow('Video',image)
    else:
        break
    key=cv2.waitKey(1)
    if key==27:
        break
video.release()
cv2.destroyAllWindows()